On Wed, Jul 21, 2021 at 04:43:44PM +0100, Christoph Hellwig wrote:
> > > I'm trying to test some changes for the gvt code, but even with a baseline
> > > 5.14-rc2 host and guest the 915 driver does not seem overly happy:
> >
> > Is this a regression over -rc1 or over 5.13?
> > Bisect possible?
>
> This was introduced somewhere between 5.12 and 5.13, still bisecting.
> Note that it only happens for "headless" setups. Once a display is
> added on the qemu command line it goes away.
The culprit is:
commit f4eb6d4906669b4285c4f49c87814d4ce63c35bb
Author: Jani Nikula <jani.nikula@xxxxxxxxx>
Date: Wed Mar 17 18:36:45 2021 +0200
drm/i915/bios: limit default outputs to ports A through F
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